Vos'yru'sadan, known to close friends by his core name Syrus, was a male Chiss who took part of in the Chiss Rebellion in 142 ABY. A native of Naporar, he was a member of the Vos family and the elder brother of the Centurion Vos'elk'eetash. The son of well-traveled traders, Syrus grew up speaking not only his native Cheunh, but also Basic and Minnisiat. From an early age he desired to join the Chiss Expansionary Defense Force. He was very close with his younger sister Selkee, despite the six-year age difference between them.